Improvement in sizing-rolls for cotton machinery



UNITED STATES PATENT ErtcE.

JOHN III. DUNLOP, OF MANCHESTER, COUNTY OF. LANCASTER, ENGLAND, ASSIGNOR TO HIMSELF AND FREDERICK CURTIS AND FRANCIS CURTIS, OF NEIVTON LOWER FALLS, MASSACHUSETTS. u

IMPROVEMENT IN SIZING-PLOLLS FOFt COTTON MACHINERY.

Specification forming part of Let-ters Patent N0. dfll. dated November 1 1864.

T0 @ZZ whom it may concern:

Be it known that I, JOHN M. DUNLOP, ot' Manchester, in the county ot Lancaster, Great Britain, have invented a new and useful Improvement in SizingRolls for Cotton Machinery; and I do hereby declare that the same is fully described and represented in the following specication, and the accompanying drawings, of which- Figure l denotes a longitudinal section, and Fig. 2 a transverse section, of a sizing-roll constructed in accordance with my invention.

In the manufacture of sizing-rolls for cotton machinery many experiments have been made to obtain a material whicltsh all resist the action ot' the acids in the sizing material, and which will wear with a smooth, even sult'ace, besides being very durable and made at reasonable cost. Aiter many experiments, soapstone rolls are now generally used, butthey are constantly wearing rough and uneven on their surface, and are expensive and difficult to make and keep in repair.

My invention is intended to overcome these objections; and it consists in constructing` or covering the outer surface ofthe roll with the substance known as hard rubber 7 or vulcanite. Such rolls have been in constant use in several mills, and are found to bc entirely unaitected by acids, and keep a smooth, even surface. They are also very durable, there being no perceptible wear of the rubber, and they can be manufactured at much less cott than any other roll ever used for the purpose.

In the drawings above referred to, A denotes the shaft or body of the roll, it being made of metal or any suitable material, a1 d B the covering or coating of hard rubber, which is secured to the body ot' the roll in any suitable manner. It may, perhaps, be found, on further experiments, that the entire roll may be made ot hard rubber.

`What I claim as my invention, and desire to secure by Letters Patent, is-

The improved roll, made as above describedM that is, with a metallic or other suitable body or shaft, and an outer covering ot' vulcanite or hard rubber, or its equivalent, substantially in the manner and for the purposes hcreinbet'ore set forth.

JOHN III. DUNLOP.

Witnesses:

S. B. TUCKER, M. SHOEEY. 

